diff options
Diffstat (limited to 'gcc/doc/invoke.texi')
| -rw-r--r-- | gcc/doc/invoke.texi | 35 |
1 files changed, 30 insertions, 5 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 3fe9d5f302c..da9694cbe7a 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -216,6 +216,8 @@ Objective-C and Objective-C++ Dialects}. -fobjc-gc @gol -fobjc-nilcheck @gol -fobjc-std=objc1 @gol +-fno-local-ivars @gol +-fivar-visibility=@var{public|protected|private|package} @gol -freplace-objc-classes @gol -fzero-link @gol -gen-decls @gol @@ -262,7 +264,7 @@ Objective-C and Objective-C++ Dialects}. -Wparentheses -Wpedantic-ms-format -Wno-pedantic-ms-format @gol -Wpointer-arith -Wno-pointer-to-int-cast @gol -Wredundant-decls -Wno-return-local-addr @gol --Wreturn-type -Wsequence-point -Wshadow @gol +-Wreturn-type -Wsequence-point -Wshadow -Wno-shadow-ivar @gol -Wsign-compare -Wsign-conversion -Wfloat-conversion @gol -Wsizeof-pointer-memaccess @gol -Wstack-protector -Wstack-usage=@var{len} -Wstrict-aliasing @gol @@ -2977,6 +2979,22 @@ for individual class implementations to be modified during program execution. The GNU runtime currently always retains calls to @code{objc_get_class("@dots{}")} regardless of command-line options. +@item -fno-local-ivars +@opindex fno-local-ivars +@opindex flocal-ivars +By default instance variables in Objective-C can be accessed as if +they were local variables from within the methods of the class they're +declared in. This can lead to shadowing between instance variables +and other variables declared either locally inside a class method or +globally with the same name. Specifying the @option{-fno-local-ivars} +flag disables this behavior thus avoiding variable shadowing issues. + +@item -fivar-visibility=@var{public|protected|private|package} +@opindex fivar-visibility +Set the default instance variable visibility to the specified option +so that instance variables declared outside the scope of any access +modifier directives default to the specified visibility. + @item -gen-decls @opindex gen-decls Dump interface declarations for all classes seen in the source file to a @@ -4360,10 +4378,17 @@ Do not warn whenever an @samp{#else} or an @samp{#endif} are followed by text. @item -Wshadow @opindex Wshadow @opindex Wno-shadow -Warn whenever a local variable or type declaration shadows another variable, -parameter, type, or class member (in C++), or whenever a built-in function -is shadowed. Note that in C++, the compiler warns if a local variable -shadows an explicit typedef, but not if it shadows a struct/class/enum. +Warn whenever a local variable or type declaration shadows another +variable, parameter, type, class member (in C++), or instance variable +(in Objective-C) or whenever a built-in function is shadowed. Note +that in C++, the compiler warns if a local variable shadows an +explicit typedef, but not if it shadows a struct/class/enum. + +@item -Wno-shadow-ivar @r{(Objective-C only)} +@opindex Wno-shadow-ivar +@opindex Wshadow-ivar +Do not warn whenever a local variable shadows an instance variable in an +Objective-C method. @item -Wlarger-than=@var{len} @opindex Wlarger-than=@var{len} |